The U.S. military is looking to enlist game theory and artificial intelligence to fight tomorrow’s unconventional warfare tactics.A masked gunman guards combat vehicles with Russian, Donetsk Republic and Ukrainian paratroopers, flags and gunmen on top, parked in downtown of Slovyansk on Wednesday, April 16, 2014.

A former U.S. Department of Defense and State Department official explains why a hard-line approach on North Korea will likely fail, as it did with Iran.A man reads a newspaper with news of a planned summit between Kim Jong Un and Donald Trump in Seoul on March 10.

Trump’s nominee to lead the agency should answer a number of tough questions about her role in its now-defunct “enhanced interrogation” program.The stage podium and chairs are seen set up before the start of CIA Director John Brennan's news conference at CIA headquarters in 2014.

Russia is advancing in key military technology areas and shows no deceleration in efforts to destabilize the West, said the commander for U.S. forces in Europe.Gen. Curtis M. Scaparrotti, speaks to more than 400 members of the U.S. EUCOM staff in Germany in 2016.

There are few U.S. officials who have ever met a North Korean representative.Ivanka Trump and Kim Yong Chol, vice chairman of North Korea's ruling Workers' Party Central Committee, right, watch the closing ceremony of the 2018 Winter Olympics in Pyeongchang on Feb. 25.

The Defense Department is also looking at major changes to speed up how it buys satellites.The Kestrel Eye, a visible-imagery satellite prototype designed to provide near-real-time images to the tactical-level ground soldier, was launched to the International Space Station in August.

Kim Jong Un's offer of talks with the United States is accompanied by questions about his intentions.Kim Yong Chol, vice chairman of North Korea's ruling Workers' Party Central Committee, second from right, talks with the South Korean delegation in Pyongyang, North Korea, on Monday.

But they could force the world trade system into a "moment of crisis."President Donald Trump speaks during a meeting with steel and aluminum executives in the Cabinet Room of the White House on March 1.

The Idaho Republican also says there's no "bloody nose" strategy: "What a dumb thing to do."Sen. James Risch, R-Idaho, arrives on Capitol Hill in August for a meeting with the secretaries of Defense and State.

Weeks after Tillerson said the U.S. and Russia share a postwar vision, Votel says Moscow is playing both “arsonist and firefighter.”Gen. Joseph Votel testifies before the House Armed Services Committee, Tues., Feb 27, 2018.

The evidence ranges from a new long-range Chinese missile to ramped-up European defense spending, an annual assessment of the world’s militaries finds.Expect China’s air-to-air combat capabilities to get a boost in the next 12 months when the PL-15, an extended-range air-to-air missile, comes online.

Budget chairman Enzi asks Mattis for timeline after report exposing flaws.Sen. Mike Enzi, R-Wyo., sent a letter seeking concrete commitments for using the new audit in light of an embarrassing report this month on poor tracking of millions of dollars by the Defense Logistics Agency.